Perhaps you should try some spelling variations:
22quality control » _quality control, forquality control, quality controls
byquality control » _quality control, forquality control, quality controls
24 reliability » 2.4 reliability, 2 reliability, 4 reliability
5 reliability » 3 reliability
2c safety » 2 safety, 22 safety, 23 safety
12 safety » 2 safety, 10 safety, 11 safety

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22quality control) OR (((byquality control) OR (quality control))))%((24 reliability) OR (5 reliability))%((2c safety) OR (12 safety)) AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (((byquality control) or (quality control))))%((24 reliability) or (5 reliability))%((2c safety) or (12 safety)) and risk%22*.